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Search: Posts Made By: budm
Forum: Troubleshooting TVs and Video Sources Today, 01:09 AM
Replies: 4
Views: 67
Posted By budm
Re: Help identify smd ceramic capacitor

Are they showing low resistance readings?
Forum: General Capacitor Questions & Issues Today, 01:03 AM
Replies: 2
Views: 49
Posted By budm
Re: What do these capacitors do.. ?

Filter caps.
Are they tested bad or what?
Forum: Troubleshooting Power Supplies and Power Supply Design Today, 01:00 AM
Replies: 2
Views: 69
Posted By budm
Re: Samsung PS alternate

https://www.badcaps.net/forum/showthread.php?p=998352#post998352
Forum: Troubleshooting Power Supplies and Power Supply Design Today, 12:36 AM
Replies: 57
Views: 628
Posted By budm
Re: Tefal GV8962 Pro Express steam iron - no power

As shown in your picture: Pin 1 (Right pin) of U2 is connected to C7, Pin 3 (Left pin) is connected to C6.

I do not understand why your readings show Voltages. Are you checking the resistance of...
Forum: Troubleshooting TVs and Video Sources Yesterday, 04:06 PM
Replies: 75
Views: 1,285
Posted By budm
Re: TCL 65S517 No Backlight, Picture and Sound OK

Too bad, it is big panel so it can get damaged easily.
Shorted LED's is probably why the reading on LED+ was very low when connected. I am glad I had you test the Voltage on the LED pins each time...
Forum: Troubleshooting TVs and Video Sources Yesterday, 03:42 PM
Replies: 16
Views: 235
Posted By budm
Re: SONY KDL-55HX850 : No backlight, no error code, rest OK

Your post #1:
If I disconnect the Driver LED cable (CN6601), nothing changes :
CN6601 pins (tested on card and psu):
TV ON :
Pin 14 : 3.3v
13 : 3.8v
12 : 0.6v
11 : 0.7v
Others : 0v
Forum: Troubleshooting Power Supplies and Power Supply Design Yesterday, 03:34 PM
Replies: 57
Views: 628
Posted By budm
Re: Tefal GV8962 Pro Express steam iron - no power

BTW, look real close at C6 and C7 soldering joints connected to U2 pin 1 and pin 3, they do not look right.
Forum: Troubleshooting TVs and Video Sources Yesterday, 01:51 PM
Replies: 34
Views: 4,896
Posted By budm
Re: Philips 40PFL4707 SMPS fuse blown.

I am curious, having all the connectors back in place and then check the resistance between circuit ground and
P ON+12/21
ALL +3.4/5.3
P-ON+24
AMP+24
Forum: Troubleshooting Power Supplies and Power Supply Design Yesterday, 01:34 PM
Replies: 57
Views: 628
Posted By budm
Re: Tefal GV8962 Pro Express steam iron - no power

https://www.badcaps.net/forum/attachment.php?attachmentid=222619&d=1603871079
It looks like it is blown up when the high Voltage dump occurred.

Circuit ground for your probe will be the Negative...
Forum: Troubleshooting TVs and Video Sources Yesterday, 01:52 AM
Replies: 33
Views: 5,942
Posted By budm
Re: Sharp Aquos LC-60LE600U no power period

R7816 is the current sensing resistor connected to the Source pin of the PFC MOSFET, when MOSFET shorted out it will blow that Source resistor, it is 0.56 Ohm Flame proof type resistor, you can use...
Forum: Troubleshooting Power Supplies and Power Supply Design Yesterday, 01:35 AM
Replies: 57
Views: 628
Posted By budm
Re: Tefal GV8962 Pro Express steam iron - no power

You need to check Voltages of U2 which looks like LDO Regulator IC.
Forum: Troubleshooting TVs and Video Sources 10-27-2020, 09:43 PM
Replies: 33
Views: 5,942
Posted By budm
Re: Sharp Aquos LC-60LE600U no power period

There should be part number printed on the Bridge and the Q7801 (PFC MOSFET).
If that PFC MOSFET is blown, more likely the components connected to the Gate and the PFC IC are likely to be damaged...
Forum: Troubleshooting Power Supplies and Power Supply Design 10-27-2020, 09:14 PM
Replies: 57
Views: 628
Posted By budm
Re: Tefal GV8962 Pro Express steam iron - no power

At this point you can leave the 100 Ohms resistor for testing for now.
So the 24V buck converter is working now, now we need to trace out the other power supply section for low Voltage that is used...
Forum: Troubleshooting TVs and Video Sources 10-27-2020, 09:11 PM
Replies: 80
Views: 5,127
Posted By budm
Re: Samsung UN60H6203AF LED TV Screen Won't Turn On

https://www.shopjimmy.com/samsung-bn44-00775a-power-supply-see-note-re-led-strips/

According to the LED drive Voltage chart, the Voltage is 326V.
So how many pair of wires are connected to the...
Forum: Troubleshooting TVs and Video Sources 10-27-2020, 07:52 PM
Replies: 5
Views: 95
Posted By budm
Re: TV regulator ic part number AS1117L

You need to look at those two resistor network connected to the ADJ pin to find out what the Output Voltage should be based on the value of those two resistors.
Forum: Troubleshooting Audio Equipment 10-27-2020, 07:47 PM
Replies: 54
Views: 449
Posted By budm
Re: Db Technologies Cromo 12 amplifier no audio

I do not know why he shows TWO removed IC's and the filter caps for the power supply, and why removed the filter chokes and mount it off board. Nothing show about the Tweeter amplifier either, that...
Forum: Troubleshooting Audio Equipment 10-27-2020, 05:55 PM
Replies: 54
Views: 449
Posted By budm
Re: Db Technologies Cromo 12 amplifier no audio

Read this post about audio probe/tracer.
https://www.badcaps.net/forum/showthread.php?t=83204&highlight=audio+probe
Forum: Troubleshooting Audio Equipment 10-27-2020, 04:56 PM
Replies: 82
Views: 759
Posted By budm
Re: Mackie CR4 amplifier no sound

You can use the through hole Transistor so it will be easy to solder for testing, the 2N2222 or 2N3904 are very generic Transistors so should be easy to get, just remember that pin out of the through...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 10-27-2020, 04:53 PM
Replies: 4
Views: 97
Posted By budm
Re: Help me identify IC s69fn

Show us the pictures of the board and the IC.
Forum: Troubleshooting Audio Equipment 10-27-2020, 04:40 PM
Replies: 82
Views: 759
Posted By budm
Re: Mackie CR4 amplifier no sound

Do you have any small through hole 3-leg NPN Transistor such as 2N2222, 2N3904 around?
Forum: Troubleshooting TVs and Video Sources 10-27-2020, 04:32 PM
Replies: 16
Views: 434
Posted By budm
Re: Philips 42PFL4606 No Backlight

That means the Backlights on command is still present on the EN pin but the IC is in protection mode some how.
Forum: Troubleshooting Audio Equipment 10-27-2020, 04:25 PM
Replies: 82
Views: 759
Posted By budm
Re: Mackie CR4 amplifier no sound

OK.
Make sure to unplug the AC from the unit when making diode test, resistance test just in case the power switch is not hard switch.
Forum: Troubleshooting Audio Equipment 10-27-2020, 04:16 PM
Replies: 82
Views: 759
Posted By budm
Re: Mackie CR4 amplifier no sound

https://www.badcaps.net/forum/attachment.php?attachmentid=222169&d=1603197623

Please look at the schematic and the spec sheet of the Transistor top get correct pinout of the Transistor.
As you...
Forum: Troubleshooting Audio Equipment 10-27-2020, 04:01 PM
Replies: 54
Views: 449
Posted By budm
Re: Db Technologies Cromo 12 amplifier no audio

According to graph as shown on page 7, pin 6 needs ot be >4.2V to be in operating mode, so at 4.9V the IC should be in operating mode.
You now need to find out if you do have audio feeding the IC or...
Forum: Troubleshooting TVs and Video Sources 10-27-2020, 12:41 PM
Replies: 5
Views: 95
Posted By budm
Re: TV regulator ic part number AS1117L

+1

https://www.badcaps.net/forum/showthread.php?p=300999#post300999
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